Unfortunately, there is no way to send a copy to the submitter.

Hi OlliSavolainen,

I believe this can be done if you customize and copy the Form block and save it with a different name. It might be easier using an External Form block or single page though.

Form block
- In the controller, it looks like you could add code for sending a customer an e-mail copy in action_submit_form().
https://github.com/concrete5/concrete5/blob/develop/web/concrete/blo...
- In the form, there is a "Notify me by email when people submit this form (Seperate multiple emails with a comma)" field. The code that processes this field is in the controller and could be modified. This would include changing the parameters added to the e-mail using addParameter().
https://github.com/concrete5/concrete5/blob/develop/web/concrete/blo...
- The Form block uses the "block_form_submission" mail template. You would need to make a new mail template that matched your controller mail parameters.
https://github.com/concrete5/concrete5/blob/develop/web/concrete/mai...

More information on sending mail:
http://documentation.concrete5.org/developers/sending-mail/working-...

What form are you using?